Validators need a Sentry? What's the required architectural setup?

[luigi]

It is not required but recommended.
The purpose is to have redundancy, and also a layer of protection.

Here’s a detailed discussion on the topic:

Sentry Node Architecture Overview

Overview The Sentry Node Architecture (referred to as SNA in this document) is an infrastructure example for DDoS mitigation on Gaia / Cosmos Hub network validator nodes. Disclaimer It is important to understand that this is only one example of solving DDoS mitigation for validator nodes. For diversity in the network, validators are encouraged to implement their own solutions. Each validator is responsible for their own solution. This example might be missing crucial security features that need…